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35kV Dry-type transformer with OLTC

Taili's 35kV Dry-type Transformer with OLTC (On-Load Tap Changer) is designed for applications with large voltage and capacity.

The OLTC effectively stabilizes output voltage, balances load distribution, and optimizes reactive and active power, ensuring safe, stable, and efficient operation of the power system by accurate and real-time voltage regulation.

The dry type transformer with OLTC is widely used in industrial plants, data centers, commercial buildings, renewable energy systems, power distribution substations, and areas with unstable grid voltage, especially where high safety and voltage stability are required.

Taili products fully comply with IEC 60076 and IEC 60214 standard.

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Basic Info.

Primary Voltage	35kV
Secondary Voltage	400 V
Vector Group	Dyn11, Dyn5, Yyn0 or others
Impedance	6%
Capacity (Power Rating)	2500kVA
H.V. Tap Range	±2 × 2.5% or others
BIL (Basic Insulation Level)	30–150 kV
Standards	IEC, IEEE, ANSI, DOE
Certificates	CE, SGS, CNAS
Usage	Rectifier Transformer, Combined Transformer, Power Transformer, Distribution Transformer

Features of 2500kVA Dry-type Transformer with OLTC:

1. Safe, fire-resistant, and environmentally friendly, suitable for installation directly at load centers.

2. Advanced manufacturing technology with high mechanical strength, strong short-circuit resistance, low partial discharge, and long service life.

3. Low loss, low noise, energy-saving, and maintenance-free design.

4. Excellent heat dissipation and strong overload capability, with capacity enhancement under forced air cooling.

5. Reliable operation in high humidity and harsh environments.

6. Intelligent temperature monitoring and protection system with automatic fan control, alarm, and trip functions.

7. Compact size, lightweight, small footprint, and low installation cost.

Technical Highlights

· On-Load Tap Changer (OLTC): Enables voltage adjustment without shutdown, ensuring consistent voltage under varying load conditions.
· Vacuum Cast Epoxy Resin Technology: Provides complete protection from moisture, dust, and chemicals.
· High Insulation Class: Suitable for harsh environmental conditions.
· Eco-Friendly & Safe: No oil leakage, self-extinguishing design.

How to choose cooling fan

Cooling fans are optional and selected based on site operating conditions:

Forced air cooling is recommended when the transformer operates under high load, frequent overload, high ambient temperature, or limited ventilation, as it effectively enhances cooling performance and overload capacity.

35kV Dry-type transformer with OLTC

Second, the core advantages and characteristics of the product

01 Production Equipments for dry type transformers

1000kVA Dry type Transformer

02 dry type transformer production process

1000kva Dry type Transformer

03 Resin artcract

1000kva Dry type Transformer

04 Ex-factory test of dry transformers

35kV Dry-type transformer with OLTC

05 Dry type transformer enclosure

1000kva Dry type Transformer

Application scenarios

Distribution power system

Industrial Facilities

Commercial buildings, high complexes, airports

Package and Shipping

1000kva Dry type Transformer

WHY CHOOSE US?

Quality Control: Our quality control system is comprehensive and multi-faceted. From the initial selection of high-grade raw materials sourced from reliable suppliers, we ensure that every component used in our products meets the highest quality standards.

Routine Tests:

Measurement of winding resistance

Measurement of voltage ratio

Check of vector group

Mesurement of impendance voltage and load loss

Measurement of no load oss and current

Separate-source voltage withstand test

Induced overvoltage withstand test

Dimension checking

Type Tests

Lighting impulse test

Temperature rise test